Patents by Inventor Ernst K. Elsner

Ernst K. Elsner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Adaptor for a film viewer
    Patent number: 4205803
    Abstract: A moving film projector, viewer or an adaptor device therefor comprising a rotatable spindle to receive a let-off spool or reel of film, a rotatable take-up spool or reel and a guide to direct the film in its desired path from the let-off spool, when this is in position on the spindle therefor, past a viewing station at which the film can be viewed or projected, and over the edge of and down towards the center plane of, the take-up spool, the take-up spool having a substantially continuous peripheral side wall towards which the film strip is guided and against which the film is coiled during use.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: June 3, 1980
    Assignee: Qualidux Industrial Company Limited
    Inventor: Ernst K. Elsner
  • Film cassette viewer
    Patent number: D254010
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: January 22, 1980
    Assignee: Qualidux Industrial Company Limited
    Inventor: Ernst K. Elsner